Liquid cooler or heater.



o. B. DALZBLL L H, PBLDMBIER.

LIQUID COOLER 0R HEATER.

APPLICATIQN FILED MAR. 8, 1911.

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LIQUID COOLER 0R HEATER.

APPLICATION FILED MAR. s, 1911.

Patented July 15, 1913.

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03 LIETLE FALLS, NEW YORK, LITTLE FALLS, NEW YQRK.

LIQUI) COOLER QR .EEA'IERh Speoication of Letters Patent.

Patented July 153., 19113.

Application filed March 1811. SelfafNc. 613,163;

To all whom t may concern i Be it known that we, CrrARLEs B. DAL- znLLand HARVEY FELDMEIER, citizens of the United States, residing at LittleFalls, in the county of Herkimer and State of New York, have invented anew and useful Improvement in Liquidoolers or Heaters, of which thefollowing is a specification.

This invention relates to that class of apparatus for cooling orhea-tingliquids in which an inner flow tube or passage is enveloped by an outeriiow tube or passage and two liquids iow in opposite directions, onethrough the inner tube or passage and the other through the annularspace between the inner tube and the enveloping tube. It an apparatus ofthis general character is employed for cooling milk, cream and the likein the process of pasteurization, itis desirable to run the hot milkthrough the vinner tube and the coolingV water or other liquid throughthe annular space between the inner tube and the enveloping tube.

The objects of the invention are mainly to produce an apparat-us of thischaracter which is so constructed that the inner surfaces of the innertube and its return bends and connections are readily accessible forcleanin so that sanitary conditions can be maintained with littleeE'o-rt; that ifa leak occurs in the connections of the diierent membersof the inner tube it can be readily repaired; that it a leak occurs inthe enveloping tube and its connections it cannot contaminate the milk;that individual sections or units can be readily combined or grouped foruse in different ways. as circumstances may require, and 'that theunequal expansion and contraction of different parts of the apparatuswhen in operation does not cause injurious strains. f

ln the accompanying drawings, consisting of two sheets: Figure l is aside elevation, Fig. 2 a frontelcvation, and, F-ig. 3 a rear elevationofthe apparatus. Fig. 4` is a fragmentary vertical section, on anenlarged scale. Fig. 5 is a horizontal section on line 5 5, Hg. 4. Fi 6is a i'ragrnentary longitudinal section o one of the outer tubes and itsstung boxes. Fig. 7 is a fragmentary longitudinal section of 1one of thereturn bends ofthe inner tubes and con` necting parts. Fig. 8 is:1v-horizontal section on line 8 8, Fig. 2. Fig. 9 is a fragmentarylongitudinal section, showing means for pre- 'these sections,

VentingA longitudinal displacement of the inner tubes.

Like reiference characters refer to like part-'s in the several figures.

The apparatus represented in Figs. l, 2 and' 3, comprises fourlongitudinal sections orunits arranged vertical-ly side by side andgrouped' so as to form three initial sections lor. u nits A B C in whichthe hotmilk is cooled by lspring water, anda final section Din Whichthemilk is cooled by ice water or brine. The hot milk enters the inner tubeat the upper front end of the first sec- 1 tion A through thepipe a,flows back and forth and downwardly through the inner tube of thissection; flows across to the secondl section B through the pipe bconnect? ing the lower-'frontl ends of the inner tubes oit thesesections, iows upwardly and' back and forth through the ,second ysectionB, iows acressto thethird section C through thevpipe c connecting theupper front ends of the inner tubes ofthese sections, flows downwardlyand back and forth'through the third section C, flows across to thefinal section D through the pipe d connecting the lower front ends ofthe inner tubes'of flowsupwardly and back and forththrough e from theupper front end of thel inner tube thereof'through the pipe e.'

Each section or unit comprises upright front and rear manifold heads orheaders 10 and 1l, which support both the inner tubes 12 and the outertubes 13, and also serve as return bends for the outer tubes, while theinner tubes extend through and beyond these headers and are connected byreturn bends 14. outside of the latter. The flow passages ofl theheaders are divided by horizont-al partitions or diaphragms 16 and 17which subdivide the cavities of these headers in such manner thatIzig-zag flow passages areformed by. thev headers andthe outer tubesthrough which the cooling liquid flows back and forth andupwardly ordownwardly through the section or unit, as indicated by the arrows inFig. 4.

p Inthe arrangement of sections represented in Figs. 11, 2 and 3, thecooling water enters the lower'endl ofthe front header 10 ofthe thirdsection C through the pipe f flows upwardly andback and forth throughthe outer tubes. 13 Iand front and rear headers of this section, Howsacross to the upper end the-final section and escapes Vto of the frontheader of the second section B through a connection orI return bend 18,flows downwardly and back and forth through the outer tubes and frontand rear headers of the second section B, flows across tothe lower endo'f. the `front header of the .first section A through a connection orreand rear headers of this section, and escapes at the lower end of thefront header through the pipe t'. The connections 18 and 19 arepreferably constructed in the form ofat return bends and permit of theready connection of any desired number of front headers.

The headers are supported upon a rigid frame of any suitableconstruction. As shown, the front headers are securedl at their lowerends to a transverse angle bar 20 which is supported by an upright frame21, and the rear headers are ,secured at their lower ends to atransverse angle bar 22 which is supported-on an upright frame 23. Theseframes areconnected by longitudinal diagonal rods 24 and-the headers areconnected by longitudinal rods 25. and tubular stays 26, Figs. 1 and 4.p

The outer tubes 13 are connected with the headers byv stuffing boxes 27arranged on the inner sides of the headers and having packings 28 andglands 29, Figs. 4 and 6. Each tube is preferably secured to one headerbut free to slide in the other header in expanding and contracting. Forthat purpose thc tube may be provided at one end with a iiange 30 whichis clamped between the bottoni of the stuiing Vbox andthe packing, whilethe tube is straight and free at the other end.

The inner tubes 12 extend through the headers and are held in positionby stuffing boxes 31 arranged in the outer sides of the headers andhaving packings 32 and glands 33. The inner tubes extend straightthrough these stung boxes of both headers and are free to expand andcontract. 1n the arrangement of partsy represented in Figs. 1 and 4, theinner tubes are held by the resistance of the stuffing boxesy only andas the boxes at'opposite ends of a tube seldom oder' exactly the sameresistance the tube moves usually only or mainly at one end in expandingand contracting, very much as if it were fastenedm at., one end and freeat the other.A

It is preferable, however, to hold the 'tube positively at one endbecause'that prevents any possible longitudinal displacement or crawlingof the tube, and for that purpose the tube may be provided at one endwith an external collar or bead 122, as represented in Fig. 9, whichcollar or bead is held in the stuiiing box v31 between the bottomthereof and the packing 32, while the tube is free to move in theopposite stuiiing box and header in expanding and contractlng. Thiscollar or bead may be swaged on the tube or secured to the same bysoldering or brazing or in any other suitable manner.

The return bends 14 which'connect adjacent inner tubes in the samesection are connected with the ends of these tubes by detachablecouplings. These couplings are preferably ,constructed as represented inFigs.4and 7 and comprise a flaring or conical seat 34 in the end of thereturn bend` which latterA is provided with an external screw thread, atapering ring 35 of ductile metal, preferably copper or brass, whichenters said seat and is thereby tightened upon the tube which itsurrounds, and a shouldered or recessed screw nut 36 which is screwedupon the threaded end of the return bend and forces the ductile ringinto the seat and against the tube. Upon removing thesereturn bends theends of the inner tubes 'are exposed and as the tubes are straight theycan be readily cleaned.

The transverse tubes Y) c d which connect the inner tubes of theadjacent headers are each composed of two elbows 37 and a straight tube38 connecting the elbows, Figs. 2, 4 and 5. Each elbow is connected tothe end of the inner tube 12 and the transverse tube 38 by a detachablemetallic coupling, preferably like that which is employed for connectingthe return bend 14 with the inner tube, and comprising a conical seat34, a tapering metallic packing ring 3i), and a screw nut 36. Thetransverse tube 38 has sufficient clearance at its ends in the elbows topermit the connection to be adjusted to the position of the headers.

The connections between the water tlow spaces of adjacent headers can bereadily changed as the desired grouping of the sections may require. Thepipes g f it and z' are leach connected with a tapped tiange 39, Fig.l

2, and by the' use of these flanges and ot return bends like those shownat 18' and 19 different groupings of sections can be effected to meetthe requirements of the user. For illustration, if five sections areemployed one may be used -with brine or ice water'and four with wellwater and these four sections may be arranged in pairs, each pair havinga separate inlet and outlet for the water, so that these four sectionsare arranged in two pairs in parallel, so to speak, which arrangementwould provide for -a comparatively larger flow of water, owing toreduced triction, than 1f these four sections were. connected in series.Each of the lower connections b and d of the inner tubes is prefer.-ably provided with a drain cock 40, as represented in Figs. 2 and 8.

Among the numerous advantages of thisl V:tree to move -in the headers,such movementv being considerable, especially when the apparatus is usedfor heating a, liquid. The inner tubes. are easily accessibleforcleaning and as the couplings applied to these tubes are of metal andcont-ain vno rubber or soft packings or gaskets thetubes and connectionscan` be easily kie/pt in a sanitary condition. tubes is of full sizethroughout. Solder joints are avoided. The headers need not be disturbedfor rearranging the grouping of the sections. Thecapacity of theapparatus can be increased Vbyl lengthening the .tubes o r by increasingthe number of sect-ions. The joints of the inner tubes with their returnbends are located outside of the headers where they areeasily accessibleif a leak should occur, and water cannot leak into the inner tubes `fromtheheaders or the outer tubes. V

We claim as our invention:

1. The combination of two headers having` flow passages, outer tubesconnecting said How passages, inner tubes extending',

through the outer tubes and headers, means for holding said inner tubesxed with relation to one of said headers, and stuthng boxes provided atthe other header through 1y which the inner movable.

2. The combination ing flow passages, said flow passages,

tubes are longitudina of two headers havmeans for holding said tubesfixed with relation to one of said' headers,

stuffing boxes provided at the other header through which the tubesarelongitudinally movable, and inner tubes passing through said headers andouter tubes.

3. The combination of two headers having flow passages and provided withstuffing boxes in their inner and outer` sides, outer tubes connectingsaid iow passages and having their end portions arranged 1n said innerstuffing boxes, means for holding -s'aid tubes against lengthwise`"movement in said inner stufiin'g boxes at one end only, inner tubesextending through the headers and through the outer stuffing boxes,tween the outer ends of the innertubes.

' 4. The combination of .two headers, each provided with transversepartitions which divide the header into separated iow passages, suchheaders having'stuiing boxes on their inner and outer sides, outer tubeshav- The flow space through the inner.

outer tubes connectingv and connections being their end portionsarranged in said in- .ner stuiing boxes, inner tubes extendingthroughthe outer tubes and the headers and through the Vouter stuffingboxes, means for holding said inner tubes at one end in said outerstufling boxes, said tubes passing freely through the opposite stuiingboxes, and con-A nections between the outer ends of the inner tubes. r

5. The combination of two headers having flow passages, outer tubesconnecting said iiow passages, tubes fixed at one end with relation to aheader, connections between said outer tubes and the other headerpermitting longitudinal movement ot said outer tubes, inner tubespassing throughsaid headers and outer means for holding said outer ttubes, means for holding said inner tubes fixed at one end with relationto a header, and connections between said inner tubes and the otherheader nal movement of said inner tubes.

6. The combination of two headers having iow passages, said headershaving stuiiing boxes on their inner and outer sides,.outer tubes havingtheir end portions arranged in said inner stuiling boxes, one end ofeach of said outer tubes havin a projection clamped in one'of saidstuiiingoxes, and inner tubes extending through the headers, outerstutl'- ing boxes and outer tubes.v

7. The combination of two headers having iow passages, said headershaving stuiing boxes on their innerl and outer sides, outer tubes havingtheir end portions arranged in said innerstuiiing boxes, and inner tubespassing through-said headers, outer stuiiing boxesand outer tubes, eachinner tube having a projection near.l one end thereof4 clamped in one ofsaid outer stuffing boxes.

8. In an apparatus for changing the tem` perature/ of liquids, thecombination of two sections, each comprising two headers having flowpassages, -outer tubes connecting said passages, inner vtubes extendingthrough said outer tubes and lsaid headers, and a transverse connectionbetween the ends of inner tubes in both sections, said transverseconnection comprising a transverse tube connected to one of said innertubes, an elbow connected to the other tube, and-a detachable couplingconnecting said elbow with said transverse tube. l

9. In-an'apparatusfor changing the tempera-ture of liquids, thecombination oftwo sections, each comprising two headers having flowpassages, outer tubes connecting sald passages, inner tubes extendingthrough said outer tubes and said headers and connections' between theends of adjacent inner tubes in the same section, and a transverseconnection between adjacent ends'of inner tubes inbot-hy sections, saidtransverse connection comprising a transverse tube, elbows connectingsaid tube with the vinner tubes, l

.through the outer and detachable couplings connecting said elbows withsaid inner tubes and with said transverse tube, substantially as setforth.

l0. The combination of two headers having flcw'passages, outer tubesconnecting said ilow passages, inner tubes extending tubes 'and headersand return bends connecting the ends of the inner tubes, the endportions of the tubes .fitting within the return bends, the ends of thereturn bends' having internal conical seats, tapered metal ringssurrounding the tubes and fitting said seats, and means, for forcingsaid rings into said seats. i

11. In an apparatus for changing the temf perature of liquids, thecombination of a plurality of sections, each comprising two headershaving flow passages, outer tubes connecting said passages, inner' tubeseX- tending through said outer tubes and said headers, and connectionsbetween the ends of adjacent inner tubes, the ends of all the headers atone end of the apparatus being alike, an inlet pipevconnected to one endof the header of the irst section, an outlet pipe connected to one endof the header of the last section, and return bends connecting thc endsof the headers of adjacent sections, the portions of said inlet andoutlet pipes and of said return bends which engage the ends of theheaders being alike, whereby the inlet and outlet pipes may be connectedto any header and any number of headers may be connected together.

Witness our hands in the presence of two subscribing witnesses.

CHARLES B. DALZELL. HARVEY FELDMEIER.

` Witnesses:

GRIFFITH PRICHARD, CELIA WooDARD.

